*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        li {
            margin-bottom: 0.25rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: #0f172a;
            margin-top: 0;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.6rem;
            margin-bottom: 0.6rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.25rem;
            margin-bottom: 0.4rem;
        }
        h4 {
            font-size: 1.05rem;
            margin-bottom: 0.3rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 60%, #0f3460 100%);
            color: #fff;
            padding: 0.75rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #fbbf24;
            font-size: 1.4rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem 1rem;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e2e8f0;
            font-weight: 500;
            font-size: 0.92rem;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fbbf24;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .breadcrumb {
            background: #fff;
            border-bottom: 1px solid #e2e8f0;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            color: #475569;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.25rem 0.5rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #94a3b8;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb .current {
            color: #64748b;
            font-weight: 500;
        }
        .page-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2rem;
            padding: 2rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 90px;
            align-self: start;
        }
        .card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.75rem;
            margin-bottom: 1.75rem;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            border: 1px solid #eef2f6;
            transition: box-shadow 0.2s;
        }
        .card:hover {
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        }
        .tier-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
            margin: 1rem 0;
        }
        .tier-table th,
        .tier-table td {
            padding: 0.6rem 0.8rem;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        .tier-table th {
            background: #f1f5f9;
            font-weight: 600;
            color: #0f172a;
        }
        .tier-table .tier-s {
            background: #dbeafe;
        }
        .tier-table .tier-a {
            background: #d1fae5;
        }
        .tier-table .tier-b {
            background: #fef3c7;
        }
        .tier-table .tier-c {
            background: #fee2e2;
        }
        .tier-badge {
            display: inline-block;
            font-weight: 700;
            padding: 0.15rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            letter-spacing: 0.02em;
        }
        .tier-s .tier-badge {
            background: #3b82f6;
            color: #fff;
        }
        .tier-a .tier-badge {
            background: #10b981;
            color: #fff;
        }
        .tier-b .tier-badge {
            background: #f59e0b;
            color: #fff;
        }
        .tier-c .tier-badge {
            background: #ef4444;
            color: #fff;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin: 0.75rem 0 0.25rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.2s;
        }
        .search-form input:focus {
            border-color: #3b82f6;
        }
        .search-form button {
            background: #1a1a2e;
            color: #fff;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #0f3460;
            transform: scale(1.02);
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #0f172a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.6rem 0.9rem;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.2s;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #3b82f6;
            outline: none;
        }
        .form-group textarea {
            min-height: 90px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.5rem;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn-primary {
            background: #1a1a2e;
            color: #fff;
        }
        .btn-primary:hover {
            background: #0f3460;
            transform: scale(1.02);
        }
        .btn-success {
            background: #10b981;
            color: #fff;
        }
        .btn-success:hover {
            background: #059669;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.15rem;
            font-size: 1.6rem;
            margin: 0.25rem 0 0.5rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f59e0b;
        }
        .feature-image {
            border-radius: 14px;
            overflow: hidden;
            margin: 1.25rem 0;
            background: #e2e8f0;
            position: relative;
        }
        .feature-image img {
            width: 100%;
            object-fit: cover;
            min-height: 200px;
            background: #cbd5e1;
        }
        .feature-image figcaption {
            padding: 0.5rem 1rem;
            background: #f8fafc;
            font-size: 0.85rem;
            color: #475569;
            border-top: 1px solid #e2e8f0;
        }
        .widget {
            background: #fff;
            border-radius: 16px;
            padding: 1.25rem 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            border: 1px solid #eef2f6;
        }
        .widget h3 {
            font-size: 1.1rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 0.4rem;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .widget ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .widget li {
            padding: 0.35rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .widget li:last-child {
            border-bottom: none;
        }
        .widget a {
            font-weight: 500;
            font-size: 0.92rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .widget a i {
            color: #f59e0b;
            font-size: 0.75rem;
        }
        friend-link {
            display: block;
            background: #f1f5f9;
            border-radius: 12px;
            padding: 1rem 1.5rem;
            margin: 1.25rem 0;
            font-size: 0.92rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
            padding: 0.2rem 0.6rem;
            background: #fff;
            border-radius: 20px;
            border: 1px solid #e2e8f0;
            transition: background 0.2s, border-color 0.2s;
        }
        friend-link a:hover {
            background: #e2e8f0;
            border-color: #94a3b8;
            text-decoration: none;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
            border-top: 4px solid #f59e0b;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
        }
        .footer-copy {
            font-size: 0.85rem;
            color: #94a3b8;
        }
        .footer-copy strong {
            color: #fbbf24;
        }
        @media (max-width: 968px) {
            .page-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 0.25rem;
                padding-top: 0.75rem;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 0.5rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.5rem 0.75rem;
                border-radius: 8px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .card {
                padding: 1rem 1.2rem;
            }
            .tier-table {
                font-size: 0.8rem;
            }
            .tier-table th,
            .tier-table td {
                padding: 0.4rem 0.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.75rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
            }
            .star-rating {
                font-size: 1.3rem;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
        }
        .text-muted {
            color: #64748b;
            font-size: 0.88rem;
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .updated-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #fef3c7;
            color: #92400e;
            padding: 0.25rem 0.9rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .schema-hidden {
            display: none;
        }
        .pro-tip {
            background: #f0fdf4;
            border-left: 4px solid #10b981;
            padding: 0.8rem 1.2rem;
            border-radius: 0 12px 12px 0;
            margin: 1rem 0;
        }
        .pro-tip i {
            color: #10b981;
            margin-right: 0.4rem;
        }
        .highlight {
            background: #fef9c3;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
            font-weight: 600;
        }